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Finding the Fourth Proportional to 9,979.70, 14,970.01 and 3,405.95

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Solution

The fourth proportional to 9,979.70, 14,970.01 and 3,405.95 is: 5,109.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,979.70 : 14,970.01 = 3,405.95 : x
  2. Step 2: Convert to fraction form
    9,979.70/14,970.01 = 3,405.95/x
  3. Step 3: Cross multiply
    9,979.70x = 14,970.01 × 3,405.95
  4. Step 4: Simplify right side
    9,979.70x = 50,987,105.56
  5. Step 5: Solve for x
    x = 50,987,105.56/9,979.70
  6. Step 6: Final answer
    x = 5,109.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.